A security guard, a type of public safety officer, surveys assigned areas or properties for illegal activities, suspicious behavior, or dangerous situations. They can work in many venues, including hospitals, power plants, and retail stores. There are no particular education requirements, although a high school diploma or the equivalent is usually required.

Security guards monitor and protect property against criminal activity and damage. These guards may work at schools, hospitals, and banks, along with such commercial properties as shopping centers, casinos, and sports venues, power plants, and transportation hubs. They monitor the flow of people and employees and respond in emergency situations.